Physics
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aps..cal.f1002a&link_type=abstract
American Physical Society, 2009 Annual Meeting of the California Section of the APS, November 13-14, 2009, abstract #F1.002
Physics
Scientific paper
We present a study of the ability of the Fermi Gamma-ray Space Telescope to detect dark-matter annihilation signals from the Galactic subhalos predicted by the Via Lactea II N-body simulation. We implement an improved formalism for estimating the boost factor needed to account for the effect of dark-matter clumping on scales below the resolution of the simulation, and we incorporate a detailed Monte Carlo simulation of the response of the Fermi-LAT telescope, including a simulation of its all-sky observing mode integrated over a ten year mission. The results are less optimistic than previous estimates that did not fully account for the variations of the LAT effective area and point-spread function. Nevertheless, for WIMP masses up to about 150 GeV/c^2 in standard supersymmetric models a few subhalos could be detectable with >5 standard deviations significance and would likely deviate significantly from the appearance of a point source.
Anderson Brandon
Diemand Juerg
Johnson Robert
Kuhlen Michael
Madau Piero
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